"If God didn't exist, Atheists wouldn't exist."

I hear this now and again from religious people, especially Christians. It was going around on Twitter today. Apparently a few people found it pretty profound. It's superficial and designed to sound clever, esoterical and wise. It's also, indirectly an argument from authority. God exists and that's that. Of course it's has no logic and is pure nonsense. It might better be inverted to say Atheists wouldn't need to exist if there was a God.

I sometimes wonder if there's any point responding to such verbal emptiness.

The most generous reading I can give to that saying is that it is confounding the belief in something with the subject of belief. In the sense that it is true that if there were no concept of god, there would be no atheists.

OTOH, even that would not be true by our understanding of the definition of atheist (without belief in a god). No matter how you interpret the phrase, anyone that finds that profound is probably too stupid to use reason.